What is GDP expressed in constant, or unchanging, prices called?

Tastes are starting to change for hybrid vehicles such that consumers are purchasing more hybrid vehicles and suppliers are choosing to produce more hybrid vehicles than they were five years ago. Due to the change in tastes, equilibrium price has fallen and equilibrium quantity has increased relative to the hybrid market from five years ago. What is the likely cause of this result?

A) Supply increased by more than demand. B) Demand increased by more than supply. C) Demand and supply increased by the same amount. D) Only supply increased.

China has developed a comparative advantage in the production of clothing. The source of this comparative advantage is

A) a large supply of natural resources. B) a large supply of unskilled workers and relatively little capital. C) investment in capital used to produce clothing. D) superior process technology.